<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Center</title>
    <style>


        .box{
            color: white;
            background-color: #1e1e1e;
            width: 100%;
            height: 1080px;
            /*overflow: auto;*/
            display: flex;
            align-items: center;
            justify-content: center;
        }
.content{
    width: 600px;height: 900px
}


    </style>
</head>
<body >

<div class="box">
    <div class="content">

            <img src="img/girl.jpg" style="width: 600px;height: 900px">

    </div>
</div>

</body>
</html>